Improvement in polishing-machines



PETER F. RANDOLPH.

Improvement in Polishing-Machines.

No. 114,341. edMay 2,1271.

Inventor UNITED STATES PATENT OFFICE. p

PETER I RANDOLPH, OF JERSEYVILLE, ILLINOIS.

IMPROVEMENTdN POLISHING-MACHINES.

Specification forming part of Letters Patent No. 114,341, dated May 2,1871.

To all whom it may concern Be it known that I, PETER I RANDOLPH, of Jerseyville, in the county of Jersey and State of Illinois, have inventeda new and Improved Polishing-Machine; and I do hereby declare that thefollowing is a full and exact description of the same, reference beinghad to the accompanying drawing, and to the letters of reference markedthereon.

This invention consists in the combination of an elastic belt with apolishing-belt, the former being arranged to run independently of thelatter, as will be fully described hereinafter.

In the drawing is represented a side elevation of a polishing-machineconstructed in accordance with the principles of my invention.

A represents a Wheel or drum of any suitable size or construction. 1)represents a pulley, the longitudinal face of which should correspondwith the similar face of the drum A. '1) represents an elastic belt,which may be constructed of any suitable yielding material, rubber,however, being preferred. a represents the polishing-belt, which isentirely independent of the elastic belt which runs within it on themain druin A and an auxiliary drum,

\ as shown.

Power may be applied in any suitable manner, and any desired number andarrangement of pulleys may be used, the former of which may be concave,convex, or of other desired forms.

The marked advantage of this arrangement is that the elastic belt iskept cool by being permitted to revolve in the air.

In practice it has been found that when the elastic substance is applieddirectly to the wheel the intense heat generated by the frietion of thegrinding-surfaces heats the rubbers and injures it.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-- The combination of an elasticbelt with a polishing-belt, the former being arranged to runindependently within the latter, as do scribed.

This specification signed and witnessed this 3d day of December, 1870.

PETER F. RANDOLPH.

Witnesses:

M. D. SELBY, J. I. MCGREADY.

